/*
 * jqModal - Minimalist Modaling with jQuery
 *
 * Copyright (c) 2007-2014 Brice Burgess @iceburg_net
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 *
 * $Version: 1.0.2 (2014.04.10 +r19)
 * Requires: jQuery 1.2.3+
 */

(function($) {

  /**
   * Initialize a set of elements as "modals". Modals typically are popup dialogs,
   * notices, modal windows, &c.
   *
   * @name jqm
   * @param options user defined options, augments defaults.
   * @type jQuery
   * @cat Plugins/jqModal
   */

  $.fn.jqm=function(options){

    var o = $.extend({}, $.jqm.params, options);

    return this.each(function(){
      var e = $(this),
        jqm = $(this).data('jqm');

      if(!jqm) jqm = {ID: I++};

      // add/extend options to modal and mark as initialized
      e.data('jqm',$.extend(o,jqm)).addClass('jqm-init');

      // ... Attach events to trigger showing of this modal
      o.trigger&&$(this).jqmAddTrigger(o.trigger);
    });
  };


  /**
   * Matching modals will have their jqmShow() method fired by attaching a
   *   onClick event to elements matching `trigger`.
   *
   * @name jqmAddTrigger
   * @param trigger a selector String, jQuery collection of elements, or a DOM element.
   */
  $.fn.jqmAddTrigger=function(trigger){
    return this.each(function(){
      if(!addTrigger($(this), 'jqmShow', trigger))
        err("jqmAddTrigger must be called on initialized modals")
    });
  };


  /**
   * Matching modals will have their jqmHide() method fired by attaching an
   *   onClick event to elements matching `trigger`.
   *
   * @name jqmAddClose
   * @param trigger a selector String, jQuery collection of elements, or a DOM element.
   */
  $.fn.jqmAddClose=function(trigger){
    return this.each(function(){
      if(!addTrigger($(this), 'jqmHide', trigger))
        err("jqmAddClose must be called on initialized modals")
    });
  };


  /**
   * Open matching modals (if not shown)
   */
  $.fn.jqmShow=function(trigger){
    return this.each(function(){ !this._jqmShown&&show($(this), trigger); });
  };

  /**
   * Close matching modals
   */
  $.fn.jqmHide=function(trigger){
    return this.each(function(){ this._jqmShown&&hide($(this), trigger); });
  };


  // utility functions

  var
    err = function(msg){
      if(window.console && window.console.error) window.console.error(msg);


  }, show = function(e, t){

    /**
     * e = modal element (as jQuery object)
     * t = triggering element
     *
     * o = options
     * z = z-index of modal
     * v = overlay element (as jQuery object)
     * h = hash (for jqModal <= r15 compatibility)
     */

    var o = e.data('jqm'),
      t = t || window.event,
      z = (parseInt(e.css('z-index'))),
      z = (z > 0) ? z : 3000,
      v = $('<div></div>').addClass(o.overlayClass).css({height:'100%',width:'100%',position:'fixed',left:0,top:0,'z-index':z-1,opacity:o.overlay/100}),

      // maintain legacy "hash" construct
      h = {w: e, c: o, o: v, t: t};

    e.css('z-index',z);

    if(o.ajax){
      var target = o.target || e,
        url = o.ajax;

      target = (typeof target == 'string') ? $(target,e) : $(target);
      if(url.substr(0,1) == '@') url = $(t).attr(url.substring(1));

       // Load the Ajax Content (and once loaded);
         // Fire the onLoad callback (if exists),
         // Attach closing events to elements inside the modal that match the closingClass,
         // and Execute the jqModal default Open Callback
      target.html(o.ajaxText).load(url,function(){
        o.onLoad && o.onLoad.call(this,h);
        open(h);
      });
    }
    else { open(h); }

  }, hide = function(e, t){
    /**
     * e = modal element (as jQuery object)
     * t = triggering element
     *
     * o = options
     * h = hash (for jqModal <= r15 compatibility)
     */

    var o = e.data('jqm'),
      t = t || window.event,

    // maintain legacy "hash" construct
    h = {w: e, c: o, o: e.data('jqmv'), t: t};

    close(h);

  }, onShow = function(hash){
    // onShow callback. Responsible for showing a modal and overlay.
    //  return false to stop opening modal.

    // hash object;
      //  w: (jQuery object) The modal element
      //  c: (object) The modal's options object
      //  o: (jQuery object) The overlay element
      //  t: (DOM object) The triggering element

    // display the overlay (prepend to body) if not disabled
    if(hash.c.overlay > 0)
      hash.o.prependTo('body');

    // make modal visible
    hash.w.show();

    // call focusFunc (attempts to focus on first input in modal)
    $.jqm.focusFunc(hash.w);

    return true;


  }, onHide = function(hash){
    // onHide callback. Responsible for hiding a modal and overlay.
    //  return false to stop closing modal.

    // hash object;
      //  w: (jQuery object) The modal element
      //  c: (object) The modal's options object
      //  o: (jQuery object) The overlay element
      //  t: (DOM object) The triggering element

    // hide modal and if overlay, remove overlay.
    hash.w.hide() && hash.o && hash.o.remove();

    return true;


  },  addTrigger = function(e, key, trigger){
    // addTrigger: Adds a jqmShow or jqmHide (key) for a modal (e)
    //  all elements that match trigger string (trigger)\

    // return false if e is not an initialized modal element
    if(!e.data('jqm')) return false;

    return $(trigger).each(function(){
      // register modal to trigger elements
      this[key] = this[key] || [];
      this[key].push(e);

    }).click(function(){

      var trigger = this;

      // foreadh modal registered to this trigger, call jqmShow ||
      //   jqmHide (key) on modal passing trigger element (e)
      $.each(this[key], function(i, e){ e[key](trigger); });

      // stop trigger click event from bubbling
      return false;
    });


  },  open = function(h){
    // open: executes the onOpen callback + performs common tasks if successful

    // transform legacy hash into new var shortcuts
     var e = h.w,
      v = h.o,
      o = h.c;

    // execute onShow callback
    if(o.onShow(h) !== false){
      // mark modal as shown
      e[0]._jqmShown = true;

      // if modal dialog
      //
      // Bind the Keep Focus Function [F] if no other Modals are open (!A[0]) +
      // Add this modal to the opened modals stack (A) for nested modal support
      //
      // else, close dialog when overlay is clicked
      if(o.modal){ !A[0]&&F('bind'); A.push(e); }
            else e.jqmAddClose(v);

      //  Attach closing events to elements inside the modal that match the closingClass
      o.closeClass&&e.jqmAddClose($('.' + o.closeClass,e));

      // IF toTop is true and overlay exists;
      //  Add placeholder element <span id="jqmP#ID_of_modal"/> before modal to
      //  remember it's position in the DOM and move it to a child of the body tag (after overlay)
      o.toTop&&v&&e.before('<span id="jqmP'+o.ID+'"></span>').insertAfter(v);

      // remember overlay (for closing function)
      e.data('jqmv',v);
    }


  },  close = function(h){
    // close: executes the onHide callback + performs common tasks if successful

    // transform legacy hash into new var shortcuts
     var e = h.w,
      v = h.o,
      o = h.c;

    // execute onShow callback
    if(o.onHide(h) !== false){
      // mark modal as !shown
      e[0]._jqmShown = false;

       // If modal, remove from modal stack.
       // If no modals in modal stack, unbind the Keep Focus Function
       if(o.modal){A.pop();!A[0]&&F('unbind');}

       // IF toTop was passed and an overlay exists;
       //  Move modal back to its "remembered" position.
       o.toTop&&v&&$('#jqmP'+o.ID).after(e).remove();
    }


  },  F = function(t){
    // F: The Keep Focus Function (for modal: true dialos)
    // Binds or Unbinds (t) the Focus Examination Function (X) to keypresses and clicks

    $(document)[t]("keypress keydown mousedown",X);


  }, X = function(e){
    // X: The Focus Examination Function (for modal: true dialogs)

    var modal = $(e.target).data('jqm') || $(e.target).parents('.jqm-init:first').data('jqm'),
      activeModal = A[A.length-1].data('jqm');

    // allow bubbling if event target is within active modal dialog
    if(modal && modal.ID == activeModal.ID) return true;

    // else, trigger focusFunc (focus on first input element and halt bubbling)
    return $.jqm.focusFunc(activeModal);
  },

  I = 0,   // modal ID increment (for nested modals)
  A = [];  // array of active modals (used to lock interactivity to appropriate modal)


  // $.jqm, overridable defaults
  $.jqm = {
    /**
     *  default options
     *
     * (Integer)   overlay      - [0-100] Translucency percentage (opacity) of the body covering overlay. Set to 0 for NO overlay, and up to 100 for a 100% opaque overlay.
     * (String)    overlayClass - Applied to the body covering overlay. Useful for controlling overlay look (tint, background-image, &c) with CSS.
     * (String)    closeClass   - Children of the modal element matching `closeClass` will fire the onHide event (to close the modal).
     * (Mixed)     trigger      - Matching elements will fire the onShow event (to display the modal). Trigger can be a selector String, a jQuery collection of elements, a DOM element, or a False boolean.
     * (String)    ajax         - URL to load content from via an AJAX request. False to disable ajax. If ajax begins with a "@", the URL is extracted from the attribute of the triggering element (e.g. use '@data-url' for; <a href="#" class="jqModal" data-url="modal.html">...)
     * (Mixed)     target       - Children of the modal element to load the ajax response into. If false, modal content will be overwritten by ajax response. Useful for retaining modal design.
     *                            Target may be a selector string, jQuery collection of elements, or a DOM element -- and MUST exist as a child of the modal element.
     * (String)    ajaxText     - Text shown while waiting for ajax return. Replaces HTML content of `target` element.
     * (Boolean)   modal        - If true, user interactivity will be locked to the modal window until closed.
     * (Boolean)   toTop        - If true, modal will be posistioned as a first child of the BODY element when opened, and its DOM posistion restored when closed. Useful for overcoming z-Index container issues.
     * (Function)  onShow       - User defined callback function fired when modal opened.
     * (Function)  onHide       - User defined callback function fired when modal closed.
     * (Function)  onLoad       - User defined callback function fired when ajax content loads.
     */
    params: {
      overlay: 50,
      overlayClass: 'jqmOverlay',
      closeClass: 'jqmClose',
      trigger: '.jqModal',
      ajax: false,
      target: false,
      ajaxText: '',
      modal: false,
      toTop: false,
      onShow: onShow,
      onHide: onHide,
      onLoad: false
    },

    // focusFunc is fired when a modal is shown, or when interaction occurs outside
    // a modal enabled dialog. Passed the modal element.
    focusFunc: function(e) { $(':input:visible:first',e).focus(); return false; }
  };

})( jQuery );
